Titanium oxide powder and method for manufacturing same
AssigneeTayca Corporation
InventorsKazumasa Ejiri, Kazuya Shibata, Yuka Hashizume
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AssigneeTayca Corporation
InventorsKazumasa Ejiri, Kazuya Shibata, Yuka Hashizume
Estimating the term…
In producing titanium oxide containing rutile-type crystals by adding hydrochloric acid to an aqueous dispersion of an alkali metal titanate, sulfurous acid, disulfurous acid, sulfuric acid or a salt thereof is added. Thus, there is provided a titanium oxide powder which is doped with bivalent sulfur atoms (S2−) and in which a ratio (IA/IR) of a peak intensity (IA) of anatase-type crystals to a peak intensity (IR) of rutile-type crystals as measured by X-ray diffractometry is 0.1 or less. Moreover, a cosmetic is provided by dispersing the titanium oxide powder in a dispersion medium. Thus, bluish color derived from Rayleigh scattering is negated, providing a dispersion, particularly a cosmetic, with excellent transparency and color tone.
A titanium oxide powder, wherein the titanium oxide powder is doped with bivalent sulfur atoms (S2), a ratio (IA/IR) of a peak intensity (IA) of anatase-type crystals to a peak intensity (IR) of rutile-type crystals as measured by X-ray diffractometry is 0.1 or less and a specific surface area is 110 to 300 m2/g.
A titanium oxide powder, wherein the titanium oxide powder is doped with bivalent sulfur atoms (S2−), a ratio (IA/IR) of a peak intensity (IA) of anatase-type crystals to a peak intensity (IR) of rutile-type crystals as measured by X-ray diffractometry is 0.1 or less and a sulfur content is 500 to 6000 ppm.
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